I would never have gotten this unless they were on sale. I'm glad I did because the quality is made really well. I actually prefer Staples brand over Avery. Avery is a bit tight while Staples sheet protectors allows me to add in extra paper.
Doing genealogy and these page protectors are great. Reduces the amount of adhesive needed. Extra copies can be stored in them. Keeps things from falling out of the books as they are moved about and flipped through.